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Which electronic dictionary is better?
There are many professional dictionaries that charge more than 9000 yuan.

Including mathematical statistics, mathematical chemistry, and the glossary of technical terms approved by the State Committee of Scientific and Technical Terminology.

It is an assistant to learn the original textbook, and it can also be queried in Chinese and English, which is very good.

At the same time, download formula calculation, drawing calculation and solving higher-order equations, and the software can be upgraded.